Coaster-brake.



- PATENTED JULY 1,6, 19o?. P. P. oHoBo. coAsTBR BRAKE. yLPILIOTION FILED JULYO. 1906.

@6 30 3,3% Zai/ 23 aww UNITED STATE-S PriENI: OFFICE.

PETER I. OHORO, (3F CHICAGO, ILLINOIS, ASSlG-NOR TO A. J. MUSSMN, ILLINOIS. i

or CHICAGO,

COASTER-BRAKE.

To all whom it may concern.'

Be it known that l, PETER P. OHono, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Coaster-Brakes, of which the following is a specification.

My invention relates to an improvement in the class of coaster-brakes in which the braking effect, induced by back-pedaling, produces-'a wedging action against an expansible spring-sleeve on the axle inside the hub of the rear wheel, to expand said sleeve against the inner surface of the hubland, thus bind it to the stationary axle. l

lhe 'primaryobject of my invention is to incorporate the braking piiinciple thus outlined in a greatly simplitied construction of coaster-brake, involving comparatively few parts and materially reduced weight and dimensions of the device,` with further important advantages of reduction in cost OLmanufacture and durability in the matters ofkeeping in working order and wear. 2

Referring to the accompanying drawings-Figure 1 shows my improved coaster-brake, mounted in its bearings, by a plan sectional view, with the braking mechanismv inside the cylindrical hub in elevation.` Fig. 2 is a similar view showing thehub and the braking mechanism coperating with it, aswell as other parts, in section, the parts in this figure, as well as those in the preceding figure, being shown in the relative positions they occupy for coasting. Fig. 3 is a view in side elevation of a ball-race ratcheted vinterlocking collar; Fig. 4, au innerfaee view of the same. Fig. 5 is an eli'd view of a ratcheted spool adapted to loosely surround the stationary rear shaft and to be held against rotation by engagement with the aforesaid collar, while havingla limited longitudinal movement; Fig. 6, a view of the same in side elevation. Fig. 7 is a view in elevation of a spring band to surround the ratcheted end of the spool upon which it is fastened. Figi 8 is a view in broken sectional elevation `of the externally tapering and internally threadedratchet-faced collar for binding the hub to the sprocket for the driving purpose of the device. Fig. 9 is a view in side elevation of the driving sprocket for the rear wheel, provided with an externally threaded hub to enter and cooperate with the collar shown in Fig. 8.v Fig. 10 is a view in elevation of the expansible split spring 'sleeve adapted to fit inside the hub and to be expanded against the inner surfaeesof the latterl for producing the braking action; Fig. Il, a similar View of the wedge for spreading the sleeve of Fig.4 10. Fig. l2 is an end view of the springband, shown in Fig. 7.

A is the rear axle of a` bicycle or motor cycle, having its bearings, as usual, in the members of the rear fork Specification of Letters Patent.

Application filed July 9,1906. Serial No. 325,279.

Patented July 16, 1907.

in which it is non-rotatably supported. Upon one threaded end 13 of the axle is screwed a ball-racc collar 14 provided on its outer face with a ratchet l5, between which, and a nut 1G screwed on the end of the axle against a washerl?, is clamped the adjacent member of the fork B. By thus clamping this fork member engagement of its inner surface with the teeth of the ratchet l5 is produced, thereby providing a simple and REISSUED effective means for securing the braking mechanism against rotation. The collar 1'4 is provided on its inner face with a lug 18, to enter a corresponding recess 19 in i the adjacent end of a split spring-sleeve 20 surrounding the axle about the spool thereon, hereinafter described,

'and abutting against the collar. The split 2l in the spring-sleeve is wedge-shaped to receive a wedge 22 for expanding the sleeve, as and for the purpose hereinafter described. The spool 23, which fits loosely about the axle inside the sleeve 20, is provided in its head 23 with a recess 24 to receive the lug 1S, which also enters the sleeve-recess 19, to hold the spool against rotation while permitting to it a limited longitudinal movement. The opposite head 2%b of the spool is faced with a ratchet 25 of greater diameter than the head on which it is provided; and this ratchet is surrounded by a springband 26 pinned to the spool, as indicated at x (Fig. 2),. and protruding, as an annular spring, beyond the face on this ratchet. l

'lhe preferred construction of the ring 26 is that illustrated, of an endless band having a series of arcshaped spring-tongues 26n extending about its outer section, and formed by cutting the 4band at intervals transversely and extending each transverse out from its inner end part way about the circumference of the' band. This spring band part way overlaps and. yieldingly bears against the outer surface of a collar 27 surrounding the axle and provided about its inner face with a ratchet 28 opposing the ratchet 25 to engage therewith, the interior of the collar 27 being provided with coarse threads 29 of great pitch and the exterior surface of this collar tapering outwardly. At 30 is shown the driving-sprocket containing in its o uter end a ball-bearing not shown, but of ordinary or.any suitable construction). From the inner face of;the sprocket extends a hub 31 carrying coarse 'screwthreads 32, this hub screwing into the collar 27 about the axle, adjacent to the threaded end 13 thereof at whiclrit is fastened by a nut 16 to the other member of'the fork B. A'ball-race is provided, as shown, about the inner face of the sprocket 30, like that formed about the collar 14, to afford ball-bearings for the ends of the/wheel-hub 33, which houses the ball-bearings at its ends and envelops the intermediate mechanism cent to the sprocket, 'surrounds the tapering collar 27,

it is provided about'its'internal surfacewith an out- Werdly tapering'section 34', in which the collar 27 Works, as and forv the purpose hereinafter described.

The` operationoiI the device is as follows; As the parts of the mechenism are represented in Figs. l and Y2, they occupy, as hereinbeore stated, their relative= positions for coasting. That is to say, the hub' S3: is

free to rotate on its ball-bearings Without turning 'any ofthe'mechanism inside-it, since the ooiln issoutof contact with the tapering surface 34 inthe-'wheelhub, and the ratchets 28 and 25 are out of engagement AWith each other.v The act of. pe-deling,A by tunning of the collar with-the tapering surface lvvvithin the Wheel-hub 33, which results, bythe ensuing clutchaction, in binding the wheelhub to the collar 27, and thus tothe hub 0i the sprocket., whereby. the peddling, in turning. the sprocket, also-turns the wheel-hub and with it the rear Wheel. The braking operation is performed by back-pedalin'g, which involves reversal oi the sprocket 30 and resultant4 turning of the threadsof the spnocketrhub 3l in the direction toforce the collar. 27 toward the left and engage its ratchet 28 with the ratchet 250x; the spool'ZS; upon which en- 'gagementv the stress of back-pedaling by pressingv the 'collar 27, by longitudinal movement thereof, yagainst the ratcheted-end of the spool, forces the latter egaimst the wedge 22; which is thus drivenv into the split 2l of thesleeve 2O suiciently far to expand the sleeve. -with great force against the surace surrounding. it of the wheel-hub, thus locking the latter. to the stationary axle .A ,since the split sleeveand spool are locked, against-rotary movement about the axle, to the' ballrace collar 14 by the lug 18, andthe' bali-race collar is itself screwed; and thus rigi'd7, upon the axle.. As

Willl be understood when.,l in. pedaling, the rider stops turning the pedals and therefore stops. the sprocket, the. momentum of the rear wheel in carrying the hul: 33 and thecollar 27 engaging yvitll it, through a veziy small portion of e 'complete rotation oi thevvbeeLl-iub causes. the collar 27 `to turn. onthehresded hub oi the sprocket in: the direction to Withdraw the collar from engagement with the beveled surface 34 in the Wheel hub;A and, obviously, the moment the@ disengege ment is effected between the beveled binding-snrfces, the wheel-hub isr tree to rotate independently for coasting.

What! claim asnen., and desire to secure. by Lettels lstent, is

1, In a coaster-brakeihe combination with a stationary axle and sprocket, of u Wheel-hub'rotutably surrounding the axle, an expunsliile brslilngssleeve surrounding the Aaxle inside said: hub, awedge for expanding said sleeve,

n spool on the axle wt'tzd sa-id sleeve engaging said wedge `and provided with a ratchet ou one end, an internally threaded collar vsulroumling the axle having a ratchet eedess oni its fece,l ineens for producing a clutch-action between tonary axle and sprocket, of .a Wheel-hub rotatably surrounding thetaxle and provided withl a tapering section an internally' threaded collar surrounding the axle, havingon its inner surface, an expansible braking-sleeve surrounding. the axle inside Vsaid hub, a Wedge for expanding said sleeve, a spool on the axle Within said sleeve engaging said wedge and provided with a ratchet on one end,

a ratchet on its face and a tapering outer surface to cooperate wltll' tlietapering section in said hub, and a threaded hub on the sprocket Working-in said collar, for the purposes set forth.

3. ln o coaster-brake,- the combination with the stationary axle'ond sprocket, of a Wheel-hub rotatably surroundingv the axle andprovided with a tapering section on. its nneisurfaoe, an expansible braking-sleeve surbounding the-axle-inside said4 hub, o.; wedge for expanding said sleeve, a spool on the axle within said sleeve, engaging said wedge and providedwith a ratchet on one end, u spring on the-ratchet en'd of seid spool, an internallythreaded collar-surrounding the axle and engaged by said spring', saideollnr. having a ratchet on its faceand-a tapering outer surface to cooperate with the taperingv surface Within said hub, and a threaded hub on the sprocket Worklug in said' collar, for the purposes set forth.

!. A@ coastenbroke comprising, in combination, asta tional-y axle having a bull-race collar-.rigidly secure on one end. und a sprocket rotatably. mounted on its opposite end und provided with :in externally-threaded hub and :t hall-yace; u spool loosely surrounding said axle, interlocking' with: seid 'coller' sndprovided with a ratchet fon' one` engi, a. sleeve surrounding und interlocking with said .spooll and split to foi-n1 o Wedge-shaped. opening in its Wall, e wedge confined in said opening-,and engaged by the ratchetedend .of said spool, u spring-band on und projecting beyond said spoolendy an internally-threaded' collar, in which said threaded sprocket-hub Works, overlapped hy seid' spring-bund and provided -ivlth a: ratchetA face and n tapering circumferentialsurface, and a Wheelliutrotatably supported at. its ends on ball-bearings in sfr-id races and' vprovidedfwith au internal tapering section to coperatie with said. taperingcollar, .for the purposes .set forth.

' 5. In combination, n coastenbrake having a stationary threaded axle and n sprocket, a wheel-hub rotatably surrounding. the axle, an expansible brakingsleeve' about snidlnxle Within. the hub, uV Wedge for' expanding said sleeve; means for` driving the wedge, u collai'vscrewed on the axle und interlocking with4 said sleeve, a ratchet on the outer face of said collar, bearings for the axle-ends, and nnuton en end of the axle; between which and sad ratchet adjacent: bearlng is clamped,

6. In combination, a: coaster-binge havingV a stationary tht-ended axle and a sprocket.. a wheel-hub rotatably sur rounding the axle, an expsinsible braking-sleeve about said vaxle vWithin the hub, dwedgevfor expanding said sleeve,

u spoolV on' the axlewithin saidsleeve engaging the Wedge, means for drivingthe spoolY against: the Wedge, u collar screwed ou the axle und interlocking with said sleeve, a

vratchet on tl'ie outer face of' said collsrfbeurings for the axle-ends, and' a nut on :1n-end of the axle,= between which and' seid rfitchet the adjacent bearing is clamped.

7. A coast/er` brake having astationary threaded; axle, bearing cones thresded on the axle, u sprocket, s, wheel hub surrounding the axle, u braking surface surrounding theI axle und held from rotation by one of the cones and mesa' l on the cone holding the braking surfaceadapted te engage the innosyfnce of the resi* fork of the vehicle to lock the cene to the fork at the point of contact batir/eenv the cone and the fork.

PETER n. orsono.

'En presence o- J. E. Lenses, U. THoerEN..

loo 

